As others have suggested, try to stick to a Solid modeler such as Autodesk Inventor, SolidWorks, etc
Rhino is great and so is Alias, but these are harder to master and make 0 volume models, i.e surfaces, but they can be stitched to make them 'solid' for printing, it depends on your time and money situation,
I have used the following and I am proficient at most, Solid Works, UG NX, Inventor, Rhino, Alias, Autodesk Maya, 3D Max,, there also the cheaper options available,